Handling overheight and out-of-gauge cargo is never a standard container operation. Flat racks, open top containers and platforms require additional clearance, safer lifting procedures and equipment that can adapt to the way each terminal actually works. This is where Over Height Frames, also known as OHFrames, become essential.
But choosing the right OHFrame is not only a technical decision. It is an operational one. A terminal with occasional overheight cargo does not need the same level of automation as a terminal that handles OOG cargo every week. A berth using multiple spreaders may prioritise universality, while another terminal may prefer a mechanically linked solution that follows the main spreader’s movements.
In practice, the best choice usually depends on three questions: how often the terminal handles oversized cargo, how much operational flexibility is required, and how much automation the terminal wants to introduce into the lifting process.
Why the type of OHFrame matters
At first glance, all Over Height Frames solve the same basic problem: they allow the terminal to lift oversized cargo safely under a spreader. The difference is how the twistlocks are operated, how the frame connects with the spreader, and how much manual intervention is required during the operation.
A manual OHFrame keeps the system simple and robust. A mechanical OHFrame reduces manual handling and can make the crane operator’s job easier. A fully automatic OHFrame adds electrical operation, diagnostics, signalling and a higher level of autonomy, making it more suitable for intense OOG cargo traffic.
This is why the decision should not be based only on the purchase price. The real comparison should include frequency of use, cycle time, labour exposure, compatibility with existing spreaders, maintenance strategy and the risk of operational delays.
A simple comparison
| Type of OHFrame | Best suited for | Main advantage | Main consideration |
| Manual OHFrame | Sporadic OOG cargo | Simplicity and easy maintenance | Requires manual operation of twistlocks |
| Mechanical OHFrame | Moderate OOG cargo | Operational support without full electrical automation | The specific model and spreader interface matter |
| Automatic OHFrame | Intense OOG cargo | Faster, more repeatable and more autonomous operation | Higher level of system sophistication |
Manual Over Height Frames: the practical choice for sporadic OOG cargo
A manual OHFrame is usually the most straightforward solution for terminals that only handle oversized cargo from time to time. In TEC Container’s range, the BA-030M is designed for oversized containers, flat racks and platforms, and its twistlocks are opened or locked by manually pulling a pair of chains. It is described as ideal for container terminals with sporadic traffic of oversized cargo.
The main strength of this approach is simplicity. There is no complex electrical system, fewer components to monitor and a maintenance profile that can be easier to manage for low-frequency use. For terminals where OOG cargo is occasional, this can be a sensible way to improve safety and efficiency compared with improvised or traditional lifting methods.
However, the manual system also has a clear operational limit. Because the locking and unlocking process depends on manual action, it is less suitable for terminals where overheight cargo is frequent, time-sensitive or integrated into high-throughput container operations. The more often the frame is used, the more important ergonomics, speed and repeatability become.
In other words, a manual OHFrame is not a “basic” solution in a negative sense. It is a targeted solution for a specific traffic profile: light, sporadic and predictable OOG handling.
Mechanical Over Height Frames: when the terminal needs more operational support
Mechanical OHFrames sit between manual simplicity and full automation. They are especially relevant when a terminal wants to reduce manual intervention but does not necessarily need a fully electric automatic frame.
TEC Container includes two mechanical options in its OHFrame range. The BA-030H is presented as a fully mechanic and universal OHFrame, recommended when a safe and efficient solution is required for moderate oversized cargo traffic. The dedicated OHFrames product page describes it as compatible with 100% of existing spreaders and intended for handling oversized containers, flat racks and platforms.
The BA-030R follows a different mechanical concept. TEC describes it as recommended when direct transmission movement between the main spreader and the OHFrame is required, making the crane operator’s task easier. Its product page also notes an important operational condition: this model requires latching plates in the spreaders and the use of a parking stand to latch and unlatch the frame to the spreader.
This distinction matters. A terminal should not simply ask whether it wants a “mechanical” frame. It should ask what type of mechanical integration fits its operation. If the terminal needs high compatibility across different spreaders, the universal concept may be decisive. If the priority is a direct mechanical relationship with the main spreader, the BA-030R approach may be more relevant, provided the required spreader adaptation and parking stand fit the terminal’s workflow.
Mechanical frames are often attractive for moderate OOG traffic because they offer a good balance between operational assistance, robustness and cost control. They can reduce the limitations of manual operation without introducing the full complexity of a highly automated system.
Automatic Over Height Frames: designed for intense OOG traffic
When a terminal handles oversized cargo frequently, the argument for automation becomes much stronger. Repeated OOG operations put pressure on cycle time, staff coordination, safety procedures and equipment availability. In this context, the OHFrame becomes part of the terminal’s regular operational rhythm, not an occasional accessory.
TEC Container’s BA-030E is its fully automatic and universal OHFrame. TEC recommends it when oversized load traffic is intense and highlights its low power consumption and autonomous operation. The OHFrames product page describes the BA-030E as compatible with 100% of existing spreaders and lists features such as solar panels, floating twistlocks, LED lights and sound signalling, Wi-Fi connection and diagnosis, real-time information screen, CE certification and onsite training courses.
The reinforced BA-030E version goes further, adding components such as inductive sensors, linear actuators, PLC and information screen, solar installation and batteries, twin mode detection plates, isolator switch and charging connector.
The main benefit is not simply that the frame is more advanced. The benefit is that automation helps make frequent OOG handling more repeatable. When the same operation is performed many times, small differences in procedure can become sources of delay or risk. Automated locking and unlocking, clear signalling and diagnostic information can support safer and more predictable operations.
For terminals with intense OOG cargo traffic, this can justify the investment. The frame is no longer just a lifting accessory; it becomes a productivity and safety tool.
